Ian
The heating element will be at the bottom of the drum nomally access is through the rear panel. You will see a brown, blue,and yellow/green wire going to it and possibly another wire going to a sensor. Most of the wires will be onto spade type terminals and are easy to slide off. Then undo the securing nut/nuts and gently pull the element out. (It may be quite tight as there is a rubber seal) Some elements are fitted to the front of the drum and access is more difficult. Remember when fitting the new one that there is a guide bracket inside the drum which stops the element touching the drum. Make sure the element slides into this to ensure correct positioning.
Scott, December 2004